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Internal Jugular Vein Anatomy — FRCA Primary MCQ

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HardAnatomyInternal Jugular Vein AnatomyFRCA Primary

In a supine adult, a transverse ultrasound examination is performed at the level of the cricoid cartilage before right internal jugular vein cannulation. Which usual anatomical relationship is correct?

Educational content. Not a substitute for clinical judgement or local policy.

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Correct answer: E — The internal jugular vein usually lies anterior or anterolateral to the common carotid artery

Explanation lettering: B = shown as A · D = shown as B · A = shown as D

E is correct. At the cricoid level, the internal jugular vein is usually anterior or anterolateral to the common carotid artery, often with some arterial overlap; a purely lateral relationship is uncommon on transverse ultrasound. Medial or posterior positions can occur as anatomical variants but are not the usual arrangement, so A and B are incorrect. The vein and carotid artery lie deep to sternocleidomastoid rather than superficial to it, excluding C. Within the carotid sheath, the vagus nerve lies posteriorly between the vein and artery, not anteriorly, excluding D. The original wording required repair because it referred to the internal carotid artery at this lower-neck landmark and implied a consistently lateral relationship.

Reference: Maecken T, Marcon C, Bomas S, Zenz M, Grau T. Relationship of the internal jugular vein to the common carotid artery: implications for ultrasound-guided vascular access. European Journal of Anaesthesiology. 2011;28(5):351–355. https://pubmed.ncbi.nlm.nih.gov/21150630/